自学教程：python之PySide2安装使用及QT Designer UI设计案例教程

>>> pip install pyside2

>>> pip show pyside2 Location: c:/users/Administrator/appdata/roaming/python/python39/site-packages  文件位置C:/Users/Administrator/AppData/Roaming/Python/Python39/site-packages/PySide2/designer.exe

C:/.../Python/Python39/site-packages/PySide2/bin/uic.exe

from PySide2.QtWidgets import * class Window:    def __init__(self):        self.win = QMainWindow() if __name__ == '__main__':    app = QApplication([])    w = Window()    w.win.show()    app.exec_()

from PySide2.QtWidgets import * if __name__ == '__main__':    app = QApplication([])    win = QMainWindow()    win.show()    app.exec_()

from PySide2.QtWidgets import *  class Window:    def __init__(self):        self.win = QMainWindow()        self.win.resize(500, 400)        self.win.move(700, 210)        self.win.setWindowTitle("测试窗口")          self.textEdit = QTextEdit(self.win)        self.textEdit.move(50, 50)        self.textEdit.resize(200, 300)        self.textEdit.setPlaceholderText("请输入文本")          self.button = QPushButton("button", self.win)        self.button.move(300, 100)        self.button.clicked.connect(self.btnClick)      def btnClick(self):        info = self.textEdit.toPlainText()   # 获取文本信息        print(info)        # print("button被点击")  if __name__ == '__main__':    app = QApplication([])    # win = QMainWindow()    # win.show()    w = Window()    w.win.show()    app.exec_()

...from PySide2.QtCore import QFilefrom PySide2.QtUiTools import QUiLoader     ... if __name__ == "__main__":    app = QApplication([])    win = QMainWindow()    w = Ui_Form()    w.setupUi(win)    win.show()    app.exec_()

from PySide2.QtWidgets import *from PySide2.QtCore import QFilefrom PySide2.QtUiTools import QUiLoader  class Window:    def __init__(self):        super(Window, self).__init__()         # 从文件中加载UI定义        qfile = QFile("demo1.ui")        qfile.open(QFile.ReadOnly)        qfile.close()         # 从UI定义中动态创建一个相应的窗口对象, 将其内部文件定义为self.ui.button        self.ui = QUiLoader().load(qfile)         self.ui.button.clicked.connect(self.btnClick)        # self.button.clicked.connect(self.btnClick)     def btnClick(self):        info = self.ui.textEdit.toPlainText()   # 获取文本信息        # info = self.textEdit.toPlainText()        print(info) if __name__ == '__main__':    app = QApplication([])    w = Window()    w.ui.show()    # w.win.show()    app.exec_()